Human chorionic gonadotropin &lpar;HCG&rpar; is a hormone&comma; produced by the developing placenta shortly after the conception and secreted into the urine&period; One Step hCG Pregnancy Test is a rapid pregnancy test&period; It adopts double antibody sandwich method detects the presence of human chorionic gonadotropin &lpar;hCG&rpar;&comma; which appears in urine very early during pregnancy&period;